Still, ultimately, natural selection cares about only one thing (or, I should say, “cares”—in quotes—about only one thing, since natural selection is just a blind process, not a conscious designer). And that one thing is getting genes into the next generation. Genetically based traits that in the past contributed to genetic proliferation have flourished, while traits that didn’t have fallen by the wayside. And the traits that have survived this test include mental traits—structures and